7.1

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2022-29208

GHSA ID

GHSA-2r2f-g8mw-9gvr

EPSS Score

0.31172%

CWE

CWE-787

Published

5/24/2022

Updated

1/30/2023

KEV Status

Technology

Python

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

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CVE-2022-29208

CVE-2022-29208: Segfault and OOB write due to incomplete validation in `EditDistance` in TensorFlow

Impact

The implementation of tf.raw_ops.EditDistance has incomplete validation. Users can pass negative values to cause a segmentation fault based denial of service:

import tensorflow as tf

hypothesis_indices = tf.constant(-1250999896764, shape=[3, 3], dtype=tf.int64) 
hypothesis_values = tf.constant(0, shape=[3], dtype=tf.int64)
hypothesis_shape = tf.constant(0, shape=[3], dtype=tf.int64)

truth_indices = tf.constant(-1250999896764, shape=[3, 3], dtype=tf.int64)
truth_values = tf.constant(2, shape=[3], dtype=tf.int64)
truth_shape = tf.constant(2, shape=[3], dtype=tf.int64) 

tf.raw_ops.EditDistance(
  hypothesis_indices=hypothesis_indices,
  hypothesis_values=hypothesis_values,
  hypothesis_shape=hypothesis_shape,
  truth_indices=truth_indices,
  truth_values=truth_values,
  truth_shape=truth_shape)

In multiple places throughout the code, we are computing an index for a write operation:

if (g_truth == g_hypothesis) {
  auto loc = std::inner_product(g_truth.begin(), g_truth.end(),
                                output_strides.begin(), int64_t{0});
  OP_REQUIRES(
      ctx, loc < output_elements,
      errors::Internal("Got an inner product ", loc,
                       " which would require in writing to outside of "
                       "the buffer for the output tensor (max elements ",
                       output_elements, ")"));
  output_t(loc) =
      gtl::LevenshteinDistance<T>(truth_seq, hypothesis_seq, cmp);
  // ...
}

However, the existing validation only checks against the upper bound of the array. Hence, it is possible to write before the array by massaging the input to generate negative values for loc.

Patches

We have patched the issue in GitHub commit 30721cf564cb029d34535446d6a5a6357bebc8e7.

The fix will be included in TensorFlow 2.9.0. We will also cherrypick this commit on TensorFlow 2.8.1, TensorFlow 2.7.2, and TensorFlow 2.6.4, as these are also affected and still in supported range.

For more information

Please consult our security guide for more information regarding the security model and how to contact us with issues and questions.

Attribution

This vulnerability has been reported by Neophytos Christou from Secure Systems Lab at Brown University.

(GitHub Advisory)

Miggo Vulnerability Database

→

CVE-2022-29208

CVE-2022-29208:

7.1

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2022-29208

GHSA ID

GHSA-2r2f-g8mw-9gvr

EPSS Score

0.31172%

CWE

CWE-787

Published

5/24/2022

Updated

1/30/2023

KEV Status

Technology

Python

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

Technical Details

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
tensorflow	pip	< 2.6.4	2.6.4
tensorflow	pip	>= 2.7.0, < 2.7.2	2.7.2
tensorflow	pip

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from multiple instances in EditDistanceOp::Compute where std::inner_product calculates a 'loc' index for tensor writes. The original validation (OP_REQUIRES) only checked against the upper bound of the output buffer. The patch explicitly adds 0 <= loc validation in 5 locations in edit_distance_op.cc, confirming these were the vulnerable code paths. The CVE description explicitly references this pattern of missing negative index validation in write operations.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

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Reasoning

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7.1

-

Basic Information

Basic Information

Concerned about an active attack path?

CVE-2022-29208: Segfault and OOB write due to incomplete validation in `EditDistance` in TensorFlow

Impact

Patches

For more information

Attribution

CVE-2022-29208:

7.1

-

Basic Information

Basic Information

Technical Details

Technical Details

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Vulnerability IntelligenceMiggo AI

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

7.1

7.1

Technical Details

Basic Information

Basic Information

CVE-2022-29208: Segfault and OOB write due to incomplete validation in `EditDistance` in TensorFlow

Impact

Patches

For more information

Attribution

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI